Figure 6

TEM observations of HP2 after compression deformation at room temperature and at 523 K. Compression deformation at room temperature: (a) bright-field TEM image of NC fcc-Al grain surrounded by intermetallics, (b) HRTEM image of NC fcc-Al close to twin boundary (TB) in image (a), (c) selected-area diffraction pattern of the NC fcc-Al grain in image (a), and (d) selected-area diffraction pattern of image (a). (h, i) SEM image of the fractured sample surface after polishing and the schematic illustration of crack propagation. Compression deformation at 523 K: (e) a bright-field TEM image with a selected-area diffraction pattern in the inset, (f) HRTEM image of the rod-like Al₁₉Gd₃Ni₅ intermetallic labeled as A in image (e), and (g) a one-dimensional Fourier-filtered image of image (e) with a selected-area diffraction pattern in the inset.